[PATCH 1/3] perf tools: Use shell function for perl cflags retrieval

[Jiri Olsa <jolsa@kernel.org>]

Using the shell function for perl cflags retrieval instead of
back quotes (``). Both execute shell with the command, but the
latter is more explicit and seems to be the preferred way.

Also we don't have any other use of the back quotes in perf
Makefiles.

Link: http://lkml.kernel.org/n/tip-ozknr59ye7pohenvlg04eibq@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/Makefile.config | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 63f534a0902f..f6786fa2419f 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -579,7 +579,7 @@ else
   PERL_EMBED_LDOPTS = $(shell perl -MExtUtils::Embed -e ldopts 2>/dev/null)
   PERL_EMBED_LDFLAGS = $(call strip-libs,$(PERL_EMBED_LDOPTS))
   PERL_EMBED_LIBADD = $(call grep-libs,$(PERL_EMBED_LDOPTS))
-  PERL_EMBED_CCOPTS = `perl -MExtUtils::Embed -e ccopts 2>/dev/null`
+  PERL_EMBED_CCOPTS = $(shell perl -MExtUtils::Embed -e ccopts 2>/dev/null)
   FLAGS_PERL_EMBED=$(PERL_EMBED_CCOPTS) $(PERL_EMBED_LDOPTS)
 
   ifneq ($(feature-libperl), 1)
-- 
2.13.6